Bone-conduction electrocochleography: clinical applications.

Cases are presented which show the clinical utility of recording an electrocochleographic response to bone-conducted stimuli. The procedure is fraught with problems of acoustic control and artifact generation, but has distinct although limited values in clarifying masking dilemmas in patients with bilateral hearing loss.

Electrocochleography in children. A retrospective study.

A follow-up study of 35 children subjected to electrocochleography (Ecog) was conducted to determine (1) agreement of Ecog results with other audiometric measures obtained subsequently, and (2) accuracy of recommendations for patient management made on the basis of Ecog results. The latter was determined by parental experience, educational placement and achievement, and information from medical and paramedical personnel currently managing the children. These data indicate that Ecog test results are valuable in helping select between possible management alternatives in children who are not testable by behavioral means.

Tone burst electrocochleography in humans.

Using tone burst stimuli with fixed parameters of rise time and duration, a functional relationship has been demonstrated between frequency and intensity of the stimulus and peak latency of electrocochleographic recordings. The feasibility of a "map" of the human cochlear partition has been shown for frequencies above 2 kHz.

Effect of nicotine on cochlear function and noise-induced hair cell loss.

Nicotine administered in high doses intravenously (1 mg/kg) and intracochlearly (10 mM) exhibited very little effect on guinea pig cochlear potentials. When administered chronically (1-20 mg/kg, i.p.